B747-400 Sys Switch AQP sit Flashcards
power up check establish power check
Batt switch off what busses do you have?
Off-2 busses main hot battery and apu hot battery bus.
Batt swt on what buses do you have?
4 total. Main hot battery bus, apu hot battery bus, main battery bus, apu battery bus.
Duration of fully charged battery?
30 min.
Standby power selector to auto what items do you have.
Pfd,nd,L fmc, L cdu, primary eicas,L adc, L eiu, L efics panel, stand by instruments.
What is power source for main and apu standby power.
Main powered by ac bus 3, apu standby powered by capt transfer bus.
Secondary power with loss of ac bus 1&3,
Main and apu hot battery bus via inverters.
Why do 2 flap indicators show flaps extended and 2 do not?
When battery switch on and the standby power switchis inauto and no other power is on the airplane, the standby power system excitation to the right wing but not the left wing.
What does x represent ?
Invalaid data
Note do not move flaps handle to match flaps.
Hydalic demand pumps off why is it important to have demand pumps off?
What if #2 selector is in auto would it be running now?
No, 1&4 are air driven
What if selector #4 is in auto, would it be running now?
No, 2&3 elect driven.
Why is it important for wipers to be off?
So you dont damage screen.
What position should the flaps handle be in.
Both position and handle should agree, leave in up position.
Alt flap selector off, what would happen if switch was in the alt position?
Arms alt flaps knob, shuts off primary and secondary modes, asymmetry not available and flap lever inop.
If the alt flap selector was in EXt , would flaps be extending?
Leading edge and trailing edge EXt elect. Max range 25 degrees.
Wx radar test
Would the radar be operating if it was in weather or wx/turb position
Where is on/off switch.
Transponder stby,
If test was selected would the tcas system test now?
No, xpndr setting, go to TA/RA.
Establish electrical power-
What does it mean when avail light is on ext pwr 1 and/ 2
Means systems are ready to recieve correct power voltage
What bus is powered with avail light illuminated?
The main deck cargo handling bus is powered on the ground when external power 2 or apu generator 2is avail
Ground handling bus is powered on the ground when APU generator 1 or ext power 1 is avail.
If both EXT and APU avail lights on, ext power has priority.
What can be accomplished with buses powered?
Ground handling bus, fuel tow and load
Ground service bus is powered on the ground and in flight whenever ac bus 1 is powered. Ground service bus poweres individual equipment items such as ,
Bat charger,fuel pumps for apu start , lights and outlets.
Grd svc switch byL1 door?
Why do we not select ext pwr #2 when we select #1 on?
Bus tie swt in auto
Why is it necessary?
Auto, arms automatic ac bus tie circuitry
Closes related dcir.
Ext power #1 swt on
What busses are now powered?
Flap position indication
Flaps start moving toward up why?
What mode are they moving in?
